David Burt writes "The first survey numbers for public library compliance with the Childrens Internet Protection Act (CIPA) were just published in Library Journals Annual Budget Report, which surveyed 424 public libraries. Unfortunately, this isnt available on-line yet, but I got it through Lexis/Nexis. Here is the relevant excerpt:

As for the Children's Internet Protection Act (CIPA), which ties receipt of E-rate discounts to filtering the Internet, 59.5% of respondents said they complied. A slightly larger percentage (65%) said they filter at least some Internet terminals. It was predicted that smaller libraries might not choose to comply with CIPA, given the limited savings; also, it is believed people in smaller, close-knit communities are less likely to flout rules of acceptable Internet usage. Indeed, only 44% of the smallest libraries (serving fewer than 10,000 people) filter any terminals, while more than three-quarters of libraries serving more than 100,000 people filter. Of those responding, 62% apply for E-rate discounts. Some 85% of libraries serving more than 500,000 people apply for discounts.
Budget Report 2005, Library Journal, January 15, 2005

CIPA went into effect for public libraries in July, 2003. So you can see this resulted in a big jump from 43% to 65%. Whats also interesting here is that 59.5% say they comply with CIPA which should mean that 59.5% of public libraries are now filtering for ALL patrons, including staff as is required by CIPA."